Coal-sifter



UNITED sTATEs PATENT oEEIcE.

` ELISHA FRENCH, OF BRAINTREE, MASSACHUSETTS.

GOAL-SIF'LER.

Specification of LettersPatent No. 11,245, dated Ju1yb11,` 1854.

erences thereof.

Of the said drawings Figure l, represents an underside view of *myV improved coal sifter. Fig. 2, is a longitudinal, vertical and central section of it. Fig. 3, is a transverse and central section of it. Fig. 4,

is a horizontal section of it.

The said coal sifter is constructed of a rectangular box, `A, which by means of a` being slidor moved endwise and drawn out ateach end of the box; its edges, a, a, being made to slide in grooves, b, ZJ,

At one end of the upper chamber, I make a rectangular opening which I provide with sliding door, F, which door is made to extend down to and not below the top of the wire frame and it is so adapted (by means of tongues and grooves) to the box as to'be capable of being raised upward when not covered by the sliding top. The other end of the box is provided with a similar sliding door, G, which is intended to cover an opening made through the end of the ash receiving chamber, D. This door however extends up to the top of the box and so as to allow the said door to be freely slid or moved over it. i

Each door is provided with a lid, (Z, against the underside of which the second finger of a persons hand may while the thumb rests on the top of the box and during the act of raising the door upward.

The bottom of the box is provided with a rocker, I, placed in its middle and made to extend in a longitudinal direction; it also has another rocker K, which extends across. the rocker, I, at right angles or transversely of the box, the same being to enable a person to rock the box in a transverse direction as well as in a longitudinal one. The lower edges of these rockers are in one plane for the purpose of enabling the box to maintain its horizontal position `when placed on a ioor.

be borne,

When the box is uncovered, we pour coal ashes or any material to be sifted into the chamber,` C. We next slide the cover inward so as to close the box; nextl the box is 'tobe seized by and between the twohands `of" a person applied respectively to its ends, the thumbs resting on thev lid of the box. While the box is so held and rests on the floor it may be rockedeither longitudinally or transversely as occasion may require, and

'should we desire to discharge the coal or grosser mattersremaining in `the chamber, C, we have only toslide the lid from over the doorof said chamber so asto` lift the said door upward, when if the box be tipped so as to bring its opposite end upward, the said grosser matters `may be discharged through the door opening, so with respect to the contents of t-he ash or receiving chamber, D, should we desire to discharge its contents, we have simply to slide the box lid in an opposite direction sufficient to enable us to elevate the door of said chamber. Next, by tipping the box ina pro-per manner the contents of such chamber may be easily discharged therefrom, the upper chamber of the box remaining entirely covered during the operation of discharging the contents of either of the said chambers.

From the above it will be seen that my `method of applying the box, the lid, and the ters Patent, is-

A coal screen in a box fitted with a sliding top and ends, and wit-h rockers placed at right angles to each other on the bottom, constructed and arranged in the manner and for the purpose set forth.

In testimony whereof I have hereunto set my signature this thirteenth day of March, A. D. 1854.

ELISHA FRENCH.

Witnesses ROBERT A. HAYDN, EBENEZER C. THAYER. 

